I know just the trick. Don't waste your time on plastics, or lures, or anything artificial. Go catch yourself a live frog, salamander, crawdad, or fish. I don't know the rules in Canada, but it sure works good here. It is the only thing that the big bass would look at on our private lake. But, if live bait is not allowed then I would suggest using a lure that resembles a frog, duck, or rat. If you want to fish the bottom then try a jig with a trailer. Like already posted, keep hidden from the fish. Also try fishing before dawn to a little after. And before dusk to night. Some night fishing with a top water can be awesome. Give it a try. let me know how it goes.
Matt